A4 Quattro Wagon V6-3.2L (BKH) (2005)
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Headlamp Control Module: Customer Interest
Lighting - Headlamp Warning ON/DTC 01771
94 06 01
May 24, 2006
2011041/2
Vehicles Affected
Condition
The adaptive lighting system functions properly otherwise.
Supersedes Technical Bulletin Group 94 number 05-07 dated December 23, 2005 due to updated Service and Warranty procedures. (2011041/1)
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Headlight range control warning is ON in driver information display. After cycling the ignition, warning symbol is OFF again.
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A sporadic DTC (01771 -- Control module for vertical headlight aim control system -J431- implausible signal) is set in the Headlight Range Control
Module.
Technical Background
Communication between Headlight Range Control Module and both Headlight Power Output Stages is briefly interrupted.
Production Solution
New Control Module Part No: 4F0 907 357E with updated software 4F0 910 357E is installed. Always check with your Parts Dept. for the latest parts
information.
Service
Check, and if necessary update software of Headlight Range Control Module as follows:
Parts replacement is not permitted replaced parts will be redebited
Update - Programming procedure, checking software level
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Select Vehicle Self Diagnosis >> 55 - Automatic vertical headlight aim control.
Similar screen appears.
